Using Phase Measurements in Existing State Estimation Programs

G.L. Kusic (USA) and N. Talaat (Egypt)


Phasor measurements, current measurements, State Estimation, snapshot data


This paper utilizes phasor measurements at busses of the power network into State Estimation programs without extensive re-coding the software. The advent of the Global Positioning System (GPS) absolute time reference allows voltage phase angles to be measured, then referred to a reference bus. Bus real power injections are updated between State Estimator iterations to satisfy phase measurements. The phasor measurement also allows line current measurements to be resolved into a real part proportional to real power. Up to this time current measurements were not used because they degrade convergence of the State Estimation algorithm.

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